Prepare the soup base: Place meatballs, broth, carrots, celery, Italian seasoning, garlic powder, salt, and pepper into the slow cooker.
½ pound 225 g small frozen meatballs (beef or turkey), 8 cups chicken broth, 2 carrots, 2 celery stalks, 1 teaspoon dried Italian seasoning, Salt and pepper to taste, ½ teaspoon garlic powder